Event: Doncaster League

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Opponent Rating Result
Peter Dawson 122 0 - 1
Peter Dawson 122 0 - 1
Peter M Tate 129 1 - 0
Iain H Forsyth 94 1 - 0
T Ed Sowerby 137 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

41 = (604 + 400 * (2 - 3)) / 5)

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